SenesTech, Inc. — Major Shareholding Notification 2025

Nov 24, 2025

xml version="1.0" encoding="UTF-8"? SCHEDULE 13G Field: Pseudo-Tag; ID: Name; Data: GLENBROOK CAPITAL MANAGEMENT 0001273782 XXXXXXXX LIVE Common stock, par value $0.001 per share 09/30/2025 0001680378 SenesTech, Inc. 81720R604 777 W. PINNACLE PEAK ROAD SUITE B104 PHOENIX AZ 85027 Rule 13d-1(c) Glenbrook Capital Management NV 0.00 582244.00 0.00 582244.00 582244.00 N 9.99 CO Includes 90,000 shares of Common Stock (as defined in Item 2(a)) underlying a Warrant (as defined in Item 4) held by an entity managed by Glenbrook Capital Management, which contains a 9.99% Blocker (as defined in Item 4). The percentage set forth in row (11) gives effect to the 9.99% Blocker. However, rows (6), (8) and (9) show the number of shares of Common Stock that would be issuable upon exercise of such Warrant in full and does not give effect to the 9.99% Blocker. Therefore, the actual number of shares of Common Stock beneficially owned by the Reporting Person, after giving effect to the 9.99% Blocker, is less than the number of shares reported in rows (6), (8) and (9). SenesTech, Inc. 3430 North Dysart Road, Suite 105, Surprise, Arizona 85379 This report on Schedule 13G is being filed by Glenbrook Capital Management, a Nevada corporation ("GCM" or the "Reporting Person") with respect to the shares of common stock, par value $0.001 per share (the "Common Stock") of SenesTech, Inc., a Delaware corporation (the "Issuer"). Grover T. Wickersham, the managing member of GCM, Richard Rudgley, and Robert W. Lishman serve on the investment committee of GCM, which serves as the investment manager to each of PFS Trust ("PFS Trust") and Glenbrook Capital Management Inc. Employee Profit-Sharing Plan ("GCM EPSP"), which hold the shares of Common Stock and Warrants reported herein. The filing of this statement should not be construed as an admission that any of the foregoing persons or any Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the securities reported herein. This Schedule 13G serves an amendment to the Schedule 13G previously filed by PFS Cap Mgt Co (CIK: 0002043507) on November 12, 2024, as subsequently amended on February 12, 2025, May 12, 2025, and August 12, 2025. Going forward, the Reporting Person will report the beneficial ownership of PFS Trust. The address for the Reporting Person is 5396 Avenue 18 1/2, Chowchilla, CA 93610. GCM is a Nevada corporation. Y The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 5,223,015 shares of Common Stock outstanding as of November 7, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the Securities and Exchange Commission on November 10, 2025, subject to the 9.99% Blocker. PFS Trust holds a Series I Common Stock Warrant of the Issuer (the "Warrants"), which contains a 9.99% beneficial ownership blocker (the "9.99% Blocker"), pursuant to which PFS Trust cannot exercise such Warrant to the extent the Reporting Person, PFS Trust or any of its or their affiliates, would beneficially own, after any such exercise, more than 9.99% of the outstanding Common Stock and the percentage set forth in Row 11 of the cover page for the Reporting Person gives effect to the 9.99% Blocker. Consequently, at this time, the Reporting Person (on behalf of PFS Trust) is not able to exercise all of the Warrants held by PFS Trust due to the 9.99% Blocker. In addition, GCM EPSP holds a Warrant which contains a 4.99% beneficial ownership blocker (the "4.99% Blocker"), pursuant to which GCM EPSP cannot exercise such Warrant to the extent the Reporting Person, GCM EPSP or any of its or their affiliates, would beneficially own, after any such exercise, more than 4.99% of the outstanding Common Stock. Consequently, due to the 4.99% Blocker, none of the Warrants held by GCM EPSP are exercisable at this time. 9.99% The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference. Y N See Item 2(a). PSF Trust has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, more than 5 percent of the outstanding shares of Common Stock. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Glenbrook Capital Management /s/ John David Kessler John David Kessler, Director 11/24/2025